WO2009119653A1 - 側材およびその製造方法並びに熱交換器用クラッド材の製造方法 - Google Patents

側材およびその製造方法並びに熱交換器用クラッド材の製造方法 Download PDF

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Publication number
WO2009119653A1
WO2009119653A1 PCT/JP2009/055932 JP2009055932W WO2009119653A1 WO 2009119653 A1 WO2009119653 A1 WO 2009119653A1 JP 2009055932 W JP2009055932 W JP 2009055932W WO 2009119653 A1 WO2009119653 A1 WO 2009119653A1
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Prior art keywords
side material
clad
heat exchanger
ingot
producing
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PCT/JP2009/055932
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English (en)
French (fr)
Japanese (ja)
Inventor
植田　利樹
徳田　健二
靖展 西岡
實人 四方
弘 國井
英明 薄谷
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株式会社神戸製鋼所
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Application filed by 株式会社神戸製鋼所 filed Critical 株式会社神戸製鋼所
Priority to US12/922,799 priority Critical patent/US8404360B2/en
Priority to CA2717372A priority patent/CA2717372C/en
Priority to CN200980106249.8A priority patent/CN101952681B/zh
Priority to MX2010010617A priority patent/MX2010010617A/es
Priority to EP09723711.9A priority patent/EP2259002B1/en
Priority to KR1020107021518A priority patent/KR101270924B1/ko
Priority to AU2009229974A priority patent/AU2009229974B2/en
Publication of WO2009119653A1 publication Critical patent/WO2009119653A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
    • B22D11/003—Aluminium alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
    • B23K35/286—Al as the principal constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
    • B23K35/286—Al as the principal constituent
    • B23K35/288—Al as the principal constituent with Sn or Zn
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B32B15/016—Layered products comprising a layer of metal all layers being exclusively metallic all layers being formed of aluminium or aluminium alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • C22C21/04—Modified aluminium-silicon alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/10—Alloys based on aluminium with zinc as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/053—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with zinc as the next major constituent
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12993—Surface feature [e.g., rough, mirror]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24058—Structurally defined web or sheet [e.g., overall dimension, etc.] including grain, strips, or filamentary elements in respective layers or components in angular relation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]

Definitions

  • the present invention relates to a side material used for a clad material (brazing sheet) for a heat exchanger used in a heat exchanger such as an automobile, a method for producing the side material, and a method for producing a clad material for a heat exchanger.
  • Patent Document 1 describes a conventional method for producing a conventional clad material for a heat exchanger as follows. First, an aluminum alloy for a core material and an aluminum alloy for a side material (in the case of Patent Document 1, a sacrificial anode material and a brazing material) are melted and cast by continuous casting, and homogenized heat treatment is performed as necessary (surface) (Sometimes smoothing heat treatment).
  • the ingots of the aluminum alloy for the side material are each hot-rolled to a predetermined thickness (see S11a and S11b in FIG. 7, melting is a melting process, casting is a casting process, surface smoothing is a chamfering process, homogeneous
  • the chemical heat treatment is described as a soaking process, and the hot rolling is described as a hot rolling process).
  • Patent Document 2 describes that a side material having a predetermined thickness sliced from an ingot is used as a side material used for a clad material for a heat exchanger, and a surface smoothing treatment is further performed on the side material. Has been. Japanese Patent Laying-Open No. 2005-232507 (paragraphs 0037, 0039, 0040) JP 2007-260769 A (paragraphs 0027 to 0040)
  • the side material used for such a conventional clad material, the manufacturing method thereof, or the clad material manufacturing method has the following problems. (1) When a hot-rolled sheet is used as the side material, there are many manufacturing processes of the clad material, and the number of hot rolling operations increases, resulting in a problem of reduced productivity.
  • the core material ingot is often chamfered by a milling machine or the like, and its surface is a chamfered surface.
  • the hot rolled sheet for side material is a roll processed surface on which a rolling line generated along the rolling direction is formed. Therefore, the ingot for the core material and the hot-rolled sheet for the side material have different surface states, and when the two are overlapped and clad hot rolled, the adhesion between the core material and the side material is likely to occur. There's a problem. And in order to improve the adhesiveness of a core material and a side material, the multipass rolling under a light pressure is needed in a clad hot rolling, and the productivity in a clad hot rolling will fall.
  • the present invention has been made in view of the above problems, and the purpose thereof is to control the surface state and flatness, and in the production of a clad material for heat exchanger, it is difficult to cause poor adhesion, and is excellent in productivity and corrosion resistance.
  • An object of the present invention is to provide a side material capable of producing a clad material for heat exchanger, a method for producing the side material, and a method for producing a clad material for heat exchanger using the side material.
  • the side material according to claim 1 is the side material used for a clad material for a heat exchanger comprising a core material and one or more side materials superimposed on one or both sides thereof.
  • a plurality of fine groove periodic forms having an arc shape toward one direction of the side material are formed on the surface of the side material, and the fine groove periodic form has an outer peripheral edge of the side material with a radius of curvature of 800 to 1500 mm.
  • the side material has a period of 1 to 8 mm in the direction, and the side material has a surface roughness in the direction of 1 to 15 ⁇ m in ten-point average roughness (Rz).
  • the core material and each side material are used at the time of crimping with the core material in the manufacture of the clad material for heat exchangers.
  • the air existing between (when there are a plurality of side members) is efficiently discharged through the fine groove periodic form, and the adhesion is improved.
  • the surface roughness of the side material within a predetermined range, it is difficult to form a gap between the core material and each side material, and adhesion is improved.
  • the crimping property (referred to here as ease of crimping by rolling) is improved, and the number of crimping passes (the number of hot rolling) is reduced.
  • the side material according to claim 2 has a flatness per 1 m in the direction of 1 mm or less. According to such a side material, by controlling the flatness to a predetermined value or less, the flatness is further improved, and the adhesion to the core material and each side material is further improved. In addition, the crimping performance is further improved, and the number of crimping passes is reduced.
  • the side material of claim 3 has a thickness of 10 to 250 mm. According to such a side material, the clad rate of the clad material for heat exchanger is appropriately adjusted by defining the thickness within a predetermined range.
  • the method for producing a side material according to claim 4 is the method for producing a side material according to any one of claims 1 to 3, wherein a metal for a side material having a component composition different from that of the core material is dissolved.
  • a surface smoothing process step of performing a surface smoothing process is performed in this order on the surface of the sliced slice material having a predetermined thickness.
  • the side material is manufactured by slicing and smoothing the surface, the surface state and flatness of the side material can be easily controlled, the thickness of the oxide film is reduced, and the surface has a predetermined shape.
  • the fine groove periodic form is formed, and the surface roughness is defined within a predetermined range.
  • the air which exists between a core material and each side material is discharged
  • the crimping performance is improved and the number of crimping passes is reduced.
  • the sliced side material is used as the side material member in the production of the heat exchanger clad material, it is necessary to reduce the thickness of the side material member by hot rolling as in the case of the conventional heat exchanger clad material. Disappears. Thereby, compared with the past, the number of hot rolling (the number of crimping passes) is reduced, and the work process is omitted.
  • the method for manufacturing a side material according to claim 5 is characterized in that, in the slicing step, the ingot for side material is sliced in parallel to the installation surface of the ingot for side material installed horizontally. .
  • the influence of the weight of the cut lump (slice lump) generated during slicing and displacement due to the shape is minimized, and the sliced side
  • the flatness of the material is improved, and the adhesion with the core material and each side material is improved.
  • the crimping performance is improved and the number of crimping passes is reduced.
  • the method for manufacturing a side material according to claim 6 includes a homogenization heat treatment step of further performing a homogenization heat treatment on the cast side material ingot after the casting step and before the slicing step. It is characterized by. According to such a manufacturing method, the internal stress of the side material ingot is removed, the flatness of the sliced side material is improved, and the adhesion to the core material and each side material is improved. In addition, the crimping performance is improved and the number of crimping passes is reduced.
  • the method for producing a side material according to claim 7 is characterized in that the surface smoothing treatment is performed by one or more methods selected from a cutting method, a grinding method, and a polishing method. According to such a manufacturing method, the surface state and flatness of the side material are improved, and the adhesion to the core material and each side material is improved. In addition, the crimping performance is improved and the number of crimping passes is reduced.
  • the method for producing a clad material for a heat exchanger according to claim 8 is a method for producing a clad material for a heat exchanger comprising a core material and one or more side materials laminated on one side or both sides thereof. At least 1 layer is the side material as described in any one of Claim 1 thru
  • the preparation process which prepares the said side material and the core material for superimposing this side material The said core A superposition process in which a material and the side material are superposed in a predetermined arrangement to form a superposition material, a homogenization heat treatment process for subjecting the superposition material to a homogenization heat treatment, and hot rolling after the homogenization heat treatment process It includes a hot rolling step and a cold rolling step in which cold rolling is performed after the hot rolling step.
  • the side material whose surface state and flatness are controlled is used as the side material member, when the side material is overlaid on the core material, the side material is separated from the core material and each side material.
  • air is present between the core material and each side material during the pressure bonding with the core material, and the air is efficiently discharged through the fine groove periodic form, thereby improving the adhesion.
  • the number of crimping passes can be reduced, and the yield and productivity are improved. These improve the productivity and corrosion resistance of the clad material for heat exchangers.
  • the side material according to claim 1 of the present invention since the surface state and flatness of the side material are controlled, in the production of the clad material for heat exchanger, it is difficult to cause poor adhesion and reduce defects such as blisters. Can be made. Moreover, since the crimping property is improved, the number of crimping passes can be reduced. By these, the clad material for heat exchangers excellent in productivity and corrosion resistance can be manufactured.
  • the side material according to claim 2 it is difficult to form a gap between the core material and each side material, and adhesion and pressure-bonding properties are further improved.
  • the side material of the third aspect since the thickness of the side material is specified, a clad material for a heat exchanger having an appropriate cladding rate can be manufactured.
  • the surface state and flatness of the side material can be easily controlled, the oxide film thickness is reduced, and the surface state of the side material is prescribed. Can do. For this reason, in the production of the clad material for heat exchangers, poor adhesion hardly occurs, and defects such as blisters can be reduced. Moreover, since the crimping property is improved, the number of crimping passes can be reduced. Further, since it is not manufactured by hot rolling, it is not necessary to reduce the thickness of the side member by hot rolling, and in the manufacture of the clad material for heat exchanger, it is manufactured by conventional hot rolling. Compared with the case of using the side material, the number of hot rolling operations is reduced, and the work process can be omitted. By these, the clad material for heat exchangers excellent in productivity and corrosion resistance can be manufactured.
  • a side material with improved flatness can be obtained, and adhesion and pressure-bonding properties with the core material are further improved.
  • the flatness of the sliced side material is further improved by performing the homogenization heat treatment on the ingot for side material, so that poor adhesion is less likely to occur.
  • the surface state of the side material is obtained by performing the surface smoothing treatment of the side material by one or more methods selected from a cutting method, a grinding method, and a polishing method.
  • the flatness is improved and adhesion failure is less likely to occur.
  • the side material produced by the above method is used as the side material member, the surface state and flatness of the side material member are controlled, It is possible to produce a clad material for heat exchanger that is less likely to cause poor adhesion and has excellent corrosion resistance. Moreover, the cladding material for heat exchangers with low manufacturing cost can be manufactured.
  • (A)-(f) is sectional drawing which shows the structure of the clad material for heat exchangers which concerns on this invention. It is a schematic diagram for demonstrating the surface state of the side material which concerns on this invention, (a), (b) is a schematic diagram for demonstrating the shape of a fine groove periodic form, (c) is (a). It is a schematic diagram which shows a part of cross section in the XX line of (b). (A), (b) is a figure which shows the flow of the manufacturing method of the clad material for heat exchangers which concerns on this invention. It is a schematic diagram which shows the outline of a side material casting process or a core material casting process.
  • (A), (b) is a schematic diagram which shows the outline of the slice method of a side material.
  • (A) is a schematic diagram which shows the structure of a laminated material
  • (b) is a schematic diagram which shows the outline of a hot rolling process. It is a figure which shows the flow of the manufacturing method of the conventional cladding material for heat exchangers.
  • the side material is used for a clad material for a heat exchanger composed of a core material and one or more side materials superimposed on one or both sides thereof.
  • a clad material for heat exchanger composed of a core material and one or more side materials superimposed on one or both sides thereof.
  • the number of layers of the side material of the clad material for heat exchanger is not limited at all. For example, as shown in FIG. 1A, a two-layer clad material 1a for a heat exchanger in which one brazing material 3 is clad on one side of the core material 2, and as shown in FIG.
  • FIG. 1 (e) a three-layer clad material for a heat exchanger in which an intermediate material 5 and a brazing material 3 are clad on one surface of a core material 2 and a sacrificial material 4 is clad on the other surface of the core material 2.
  • a five-layer clad material 1f for a heat exchanger in which an intermediate material 5 and a brazing material 3 are clad on both surfaces of the core material 2 are listed.
  • I can make it.
  • the present invention can also be suitably applied to a cladding material for heat exchangers of six layers or more in which the number of side members (brazing material, sacrificial material, intermediate material) is further increased. Absent.
  • the side material A (A1, A2) has a fine groove periodic configuration on the surface thereof that has an arc shape in the longitudinal direction of the side material A. ) A plurality of B are formed.
  • the fine groove periodic form B extends to the outer peripheral edge F of the side member A with a radius of curvature R of 800 to 1500 mm, and has a period D of 1 to 8 mm in the longitudinal direction of the side member A.
  • the side material A has a surface roughness in the longitudinal direction of 1 to 15 ⁇ m in ten-point average roughness (Rz).
  • the surface state of the side material A is controlled by appropriately adjusting the rotational speed and feed speed of the disk of the disk device in the surface smoothing process.
  • the fine groove periodic form B means a form of a period D including the form of one fine groove C portion as shown in FIG. That is, the portion of the period D is a fine groove periodic form B having one period. Further, the form of the fine groove C part includes one in which a plurality of fine grooves are formed in the fine groove C part (not shown). Further, the shape of the portion of the fine groove C is like a cutting trace, a grinding trace, a polishing trace, etc. during the surface smoothing process.
  • FIG. 2C is a schematic diagram in which the vertical direction is enlarged for convenience.
  • the fine groove periodic form B does not cause a defect in the clad material.
  • the longitudinal direction is a rolling direction when the side material A is overlapped with the core material and hot-rolled in the production of the clad material for heat exchanger described later.
  • “being arc-shaped toward the longitudinal direction of the side material A” means that all the fine groove periodic forms B are arc-shaped in the same direction toward either one of the longitudinal directions of the side material A.
  • the longitudinal direction is undetermined.
  • the rolling direction is determined as shown in FIG.
  • the curvature radius R and the period D of the fine groove periodic form B By defining the curvature radius R and the period D of the fine groove periodic form B to predetermined values, air existing between the core material and each side material at the time of pressure bonding with the core material in the manufacture of the clad material for heat exchangers , It is efficiently discharged through the fine groove periodic form B. Further, by defining the surface roughness to a predetermined value, it becomes difficult to form a gap between the core material and each side material. For this reason, the adhesion can be improved and defects such as blisters can be reduced, the crimping ability can be improved, and the number of crimping passes can be reduced.
  • the fine groove periodic form B is necessary to provide the fine groove periodic form B on at least the surface of the side material that is clad with the core material. Although it is not necessary for the non-clad surface (that is, the outermost surface at the time of pressure rolling), there is no particularly bad effect even if the fine groove periodic form B is provided on the surface. Even in the case of a four-layer material or an intermediate layer of a five-layer material, it is necessary to provide the fine groove periodic form B at least on the surface clad with the core material, and it is not necessary on the surface opposite to the core material. Even if the fine groove periodic form B is provided on the surface opposite to the core material, there is no particularly bad effect.
  • ⁇ Curved radius of fine groove periodic form 800-1500 mm> If the radius of curvature R of the fine groove periodic form B is less than 800 mm, the residual air in the hot rolling process in the production of the clad material for heat exchanger described later is localized, and the effect of improving the adhesion and pressure-bonding properties is insufficient. It becomes. On the other hand, if it exceeds 1500 mm, the distance to which air is discharged becomes too long, and the effect of improving the adhesion and pressure-bonding properties becomes insufficient. Accordingly, the curvature radius R of the fine groove periodic form B is set to 800 to 1500 mm. The thickness is preferably 900 to 1300 mm.
  • the fine groove periodic form B extends to the outer peripheral edge F of the side material A. That is, it is continuously formed without tearing toward the outer peripheral edge F of the side member A.
  • the direction of the rolling (longitudinal direction) is set as described above, and the groove extends in a direction substantially perpendicular to the rolling direction. Become a shape. In that case, the force of exhausting air along the grooves (extruded by the rolling of the rolling roll) becomes difficult to work.
  • the upper limit value of the curvature radius R is provided from such a viewpoint.
  • the curvature radius R can be measured, for example, by taking a photograph of a fine periodic form and measuring the curvature of a corresponding arc on a photograph or a monitor capable of processing a photograph image in consideration of the magnification.
  • the period D of the fine groove period form B is 1 to 8 mm.
  • the period D in the longitudinal direction is a substantially constant value at any point in the period D of the fine groove period form B, and the numerical value is 1 It means a range of ⁇ 8 mm. If the period D of the fine groove period form B is less than 1 mm, an air discharge passage cannot be secured and air cannot be discharged sufficiently. On the other hand, when it exceeds 8 mm, the number of fine groove periodic forms B decreases, the air remaining between the core material and each side material increases, and the occurrence of blistering increases. Therefore, the period D of the fine groove periodic form B is set to 1 to 8 mm.
  • the thickness is preferably 2 to 7 mm.
  • the arc shape of the fine groove periodic form B may be such that the center of the arc is located at the center in the width direction of the side material A as shown in FIG. 2 (a). As shown, the center of the arc may be located at a position shifted to either side from the center of the side material A in the width direction.
  • the period is measured, for example, by creating a replica in which the arc shape of the surface of the side material having a fine periodic structure is transferred onto the resin, and the surface roughness is measured in the same manner as the ten-point average roughness measurement method described later. This can be done by measuring the thickness.
  • the shape of such fine groove periodic form B can be controlled by the surface smoothing process of the slice material described later.
  • a cutting method, a grinding method, a polishing method or the like as a surface smoothing method
  • the method is performed in combination with a rotating disk device, and at that time, a smoothing process is performed so that it is horizontal in the longitudinal direction of the ingot (slicing material) and the center of the rotating disk device is the center of the ingot width direction. Further, in order to obtain the shape as shown in FIG.
  • the center of the rotary disk device when performing the surface smoothing process as described above, is centered in the ingot width direction and horizontally in the longitudinal direction of the ingot.
  • the surface is smoothed by shifting to either side.
  • both ends of the side material A are cut off at the edges in the longitudinal direction by the dimension of the side material A, but the fine groove periodic form B at both ends also faces the longitudinal direction. It can be said that it is formed in an arc shape.
  • the side material A has a surface roughness in the longitudinal direction of 1 to 15 ⁇ m in ten-point mean roughness (Rz).
  • the ten-point average roughness (Rz) is less than 1 ⁇ m, a sufficient air discharge passage is not ensured.
  • the thickness exceeds 15 ⁇ m, adhesion failure is likely to occur in the heat exchanger clad material. Therefore, the surface roughness is 1 to 15 ⁇ m in ten-point average roughness (Rz).
  • the thickness is preferably 3 to 14 ⁇ m.
  • the shape including the fine groove C is reflected. That is, the fine groove C mainly contributes to the surface roughness referred to here.
  • the 10-point average roughness is measured based on, for example, “JIS Standard B0601 Surface Roughness”, a surface roughness measuring instrument (SURFCORDER SE-30D) manufactured by Kosaka Laboratory Ltd. Can be performed by measuring at a reference length of 25 mm. Moreover, it measures including the length for at least 2 periods or more of the location where the fine groove periodic form B of the surface of the side material A was formed. That is, measurement is performed including the fine groove C.
  • Such regulation of the surface roughness can be controlled by the surface smoothing process of the slice material described later.
  • the flatness per 1 m in the longitudinal direction of the side material A is preferably 1 mm or less, and the thickness of the side material A (thickness of one side material layer) is preferably 10 to 250 mm. ⁇ Flatness: 1 mm or less> If the flatness exceeds 1 mm, adhesion failure is likely to occur in the heat exchanger clad material. Accordingly, the flatness is preferably 1 mm or less, and more preferably 0.5 mm or less. The flatness can be measured, for example, by applying a 1 m metal rule so that the longitudinal direction of the side material is 1 m, and measuring the generated gap using a clearance gauge.
  • ⁇ Thickness 10 to 250 mm>
  • the thickness is less than 10 mm, when the side material and the core material are crimped, the side material is too thin, causing uneven deformation such as undulation in the side material itself, and the cladding thickness is likely to fluctuate. As a result, the change in the cladding ratio increases.
  • the thickness exceeds 250 mm, the load that presses the side material with the rolling rolls during pressure bonding does not sufficiently reach the pressure bonding interface between the side material and the core material.
  • the crimped state becomes non-uniform, and the elongation during rolling of the side material portion changes corresponding to the non-uniformity of the crimped state, which causes a fluctuation in the cladding ratio. Therefore, when the thickness is out of the above range, the clad rate of the clad material for heat exchanger tends to be inappropriate. In addition, poor adhesion may occur. Therefore, the thickness is preferably 10 to 250 mm, more preferably 20 to 200 mm.
  • the other material to be pressure-bonded (a core material or another side material if an intermediate layer is required) Even if the surface state is not specified, the effect of improving the adhesion and pressure-bonding properties is exhibited.
  • the mating material (core material, or another side material if an intermediate layer is required) to be crimped has the same surface state as the side material A of the present invention, The discharge effect is further increased, and the effect of improving the adhesion and pressure-bonding properties is obtained, and the effect of reducing the swelling is obtained. Therefore, when the material on the other side to be crimped is a side material for the intermediate layer, it is preferable that the surface state is the same as that of the side material of the present invention by the surface smoothing treatment. Moreover, when the material of the other party crimped
  • the direction of hot rolling at the time of pressure bonding is the rolling direction shown in FIGS. 2 (a) and 2 (b).
  • the side material manufacturing method is to manufacture the side material by a side material manufacturing step S1a.
  • This side material manufacturing process S1a includes a melting process, a casting process, a slicing process, and a surface smoothing process (described as a chamfering process in FIG. 3).
  • a homogenization heat treatment step (referred to as a soaking step in FIG. 3) may be provided after the casting step and before the slicing step.
  • the melting step is a step of melting a side metal having a different component composition from the core material.
  • a 4000 series Al—Si based aluminum alloy can be used for the brazing material.
  • the Al—Si based alloy includes an alloy containing Zn in addition to Si.
  • Al—Si based alloy for example, Al-7 to 13 mass% Si based alloy or Al-7 to 13 mass% Si-2 to 7 mass% Zn based alloy can be used.
  • any alloy that can be used as a brazing material can be applied.
  • a 3000 series Al—Mn aluminum alloy or a 7000 series Al—Zn— is used as a sacrificial material.
  • An Mg-based aluminum alloy can be used, and an Al—Zn-based alloy can be used.
  • the Al—Zn-based alloy includes an alloy containing Mn and Si in addition to Zn.
  • Examples of Al-Zn alloys include Al-1 to 7 mass% Zn alloys, Al-0.5 to 1.2 mass% Mn-0.5 to 1.2 mass% Si-2 to 6 mass%.
  • a Zn-based alloy and Al-0.8 to 1.2 mass% Si-2 to 6 mass% Zn-based alloy can be used. All can be applied.
  • the clad material for heat exchanger is provided with an intermediate material as a side material metal (see 1d to 1f in FIG. 1)
  • an intermediate material 1000 series pure aluminum or 7000 series Al—Zn—Mg based aluminum alloy is used as an intermediate material.
  • an Al—Mn alloy can be used.
  • the Al—Mn alloy includes alloys containing Cu, Si, and Ti in addition to Mn.
  • Al-Mn alloy examples include Al-0.5 to 1.2 mass% Mn-0.5 to 1.2 mass% Cu-0.5 to 1.2 mass% Si-based alloy, Al-0 Although 0.5 to 1.2 mass% Mn-0.5 to 1.2 mass% Cu-0.5 to 1.2 mass% Si-0.05 to 0.3 mass% Ti-based alloy can be used, However, the present invention is not limited to these, and any alloy that can be used as an intermediate material can be applied. The adjustment of the component composition of the metal can be appropriately determined according to the use of the clad material for heat exchanger to be used.
  • the casting process is a process for producing the ingot for side material by casting the metal for side material melted in the melting process.
  • a semi-continuous casting method can be used.
  • a molten metal M here, a metal for a side material
  • a metal water-cooled mold 11 having an open bottom.
  • the metal solidifies from the bottom of the water-cooled mold 11 is continuously taken out to thereby obtain a ingot for side material 17 having a predetermined thickness T 1.
  • the molten metal M is supplied from the trough 12 to the water-cooled mold 11 through the nozzle 13, the float 14 and the glass screen 15.
  • the molten metal M supplied to the water-cooled mold 11 is solidified by being in contact with the inner wall surface of the water-cooled mold 11 cooled by the cooling water W to become a solidified shell 16. Further, the cooling water W is directly sprayed from the lower part of the water-cooled mold 11 onto the surface of the solidified shell 16 to continuously produce the side material ingot 17.
  • the thickness T 1 of the ingot for side material 17 is preferably 200 to 700 mm.
  • the width and length of the side material ingot 17 are not particularly limited, but considering the productivity, the width is preferably 1000 to 2500 mm and the length is preferably 3000 to 10,000 mm.
  • the semi-continuous casting method may be performed either vertically or horizontally.
  • the slicing step is a step of slicing the side material ingot to a predetermined thickness.
  • a slab slicing method can be used as the slicing method.
  • the side material ingot 17 manufactured by the semi-continuous casting method is sliced by a band saw cutter or the like (not shown), so that the predetermined thickness T 2 is obtained.
  • Side material 35 (slicing material) is manufactured.
  • the thickness T 2 of the side member 35 after the surface smoothing treatment, preferably a thickness comprised between 10 ⁇ 250 mm, and more preferably a thickness which is a 20 ⁇ 200 mm.
  • the installation surface 35a is a surface in contact with the installation table of the slicing device for the side material ingot 17.
  • the surface smoothing process is a process of performing a surface smoothing process on the surface of a sliced side material (slice material) having a predetermined thickness.
  • the sliced side material 35 (sliced material) having a predetermined thickness is used to control the surface state and flatness of the side material before it is overlapped with the core material, and the crystallized product and oxide formed on the surface.
  • a surface smoothing process is performed to remove water.
  • a cutting method such as end mill cutting or diamond bite cutting, a grinding method in which the surface is ground with a grindstone, a polishing method such as buffing, or the like can be used, but it is not limited thereto. .
  • the surface state of the side material of the present invention can be obtained.
  • the surface state which has the desired fine groove period form B is obtained by controlling the rotational speed of a disk, and the feed speed of the disk on a slice material.
  • the surface thereof has an arc shape in the longitudinal direction of the side material, and has a radius of curvature of 800 to 1500 mm, preferably 900 to 1300 mm.
  • a side member 35 having a fine groove periodic form B formed by extending to the outer peripheral edge of the side member and having a period of 1 to 8 mm, preferably 2 to 7 mm in the longitudinal direction can be obtained.
  • the surface roughness in the longitudinal direction is 1 to 15 ⁇ m, preferably 3 to 14 ⁇ m in terms of 10-point average roughness (Rz), and in the evaluation of flatness, the flatness per 1 m in the longitudinal direction is 1 mm or less, preferably 0 A side member 35 of 5 mm or less can be obtained.
  • the CASS test salt spray test: JIS Z 2371
  • the immersion test Na + : 118 ppm, Cl ⁇ : 58 ppm is used as an internal surface corrosion resistance test.
  • SO 4 2 ⁇ : 60 ppm, Cu 2+ : 1 ppm, Fe 3+ : 30 ppm at 80 ° C. for 2000 hours, and then the clad material for heat exchanger having a corrosion depth of 60 ⁇ m or less after the test.
  • the homogenization heat treatment step is a step of further performing the homogenization heat treatment on the cast side material ingot.
  • the side material ingot 17 cast by the casting method is appropriately subjected to a homogenization heat treatment step before slicing the side material ingot 17 as necessary.
  • Homogenization heat treatment for removing stress may be performed.
  • the temperature and time of the homogenization heat treatment are not particularly limited, but the treatment temperature is preferably 350 to 600 ° C. and the treatment time is preferably 1 to 10 hours.
  • the treatment temperature of the homogenization heat treatment is less than 350 ° C.
  • the amount of internal stress removed is small, and the solute element segregated during casting becomes insufficiently homogenized, so that the effect of the heat treatment is small.
  • the processing temperature exceeds 600 ° C.
  • a phenomenon called burning in which a part of the ingot surface is melted is likely to cause surface defects in the clad material for heat exchanger.
  • the treatment time is less than 1 hour, the effect of removing internal stress is small and homogenization tends to be insufficient.
  • the processing time is preferably 10 hours or less in consideration of productivity.
  • the method for producing a heat exchanger clad material is a method for producing a heat exchanger clad material comprising a core material and one or more side materials superposed on one or both sides thereof, as shown in FIGS. ), A preparatory process including a side material manufacturing process S1a and a core material manufacturing process S1b, a superposition process, a homogenization heat treatment process S3 (referred to as a soaking process in FIG. 3), and a hot rolling process. S4 and cold rolling process S5 are included.
  • the preparation step is a step of preparing a side material and a core material for overlapping the side material.
  • a side material and a core material are manufactured by the side material manufacturing process S1a and the core material manufacturing process S1b.
  • the side material manufacturing step S1a Since the side material manufacturing step S1a is as described above, the description thereof is omitted here.
  • the clad material for heat exchangers at least 1 layer of a side material may be manufactured by the said manufacturing method (side material manufacturing process S1a), and the other layer may be manufactured by the conventional manufacturing method.
  • the core material manufacturing process S1b includes a melting process and a casting process. If necessary, at least one of a surface smoothing process (described as a chamfering process in FIG. 3) and a homogenization heat treatment process (described as a soaking process in FIG. 3) may be provided.
  • a surface smoothing process described as a chamfering process in FIG. 3
  • a homogenization heat treatment process described as a soaking process in FIG. 3
  • the melting step is a step of melting the core metal having a different component composition from the side material.
  • the metal for the core material 2000 series Al-Cu series aluminum alloy, 3000 series Al-Mn series aluminum alloy, 5000 series Al-Mg series aluminum alloy, etc. can be used, but are not limited to these. However, any alloy that can be used as a core material can be applied.
  • the adjustment of the component composition of the metal can be appropriately determined according to the use of the clad material for heat exchanger to be used.
  • the casting process is a process for producing a core ingot by casting the core metal melted in the melting process.
  • the semi-continuous casting method described above can be used.
  • the thickness T 1 (see FIG. 4) of the core material ingot 25 is preferably 200 to 700 mm.
  • the width and length of the core material ingot 25 are not particularly limited, but considering the productivity, the width is preferably 1000 to 2500 mm and the length is preferably 3000 to 10000 mm.
  • the surface smoothing process is a process of performing a surface smoothing process on the surface of the ingot for core material manufactured in the casting process.
  • the surface roughness in the longitudinal direction is 1 to 15 ⁇ m, preferably 3 to 14 ⁇ m in ten-point average roughness (Rz).
  • Rz ten-point average roughness
  • a core material having a flatness per 1 m in the direction of 1 mm or less, preferably 0.8 mm or less can be obtained. If the surface roughness is less than the above range, wrinkles are likely to occur, and processing tends to be difficult. When the surface roughness exceeds the above range, adhesion failure is likely to occur in the heat exchanger clad material.
  • the core material can also have the same surface state as the side material of the present invention.
  • the homogenization heat treatment step is a step of performing a homogenization heat treatment on the core material ingot cast in the casting step.
  • the temperature and time of the homogenization heat treatment are not particularly limited, but the treatment temperature is preferably 350 to 600 ° C. and the treatment time is preferably 1 to 10 hours.
  • the treatment temperature of the homogenization heat treatment is less than 350 ° C., the amount of internal stress removed is small, and the solute element segregated during casting becomes insufficiently homogenized, so that the effect of the heat treatment is small.
  • the processing temperature exceeds 600 ° C.
  • a phenomenon called burning in which a part of the ingot surface is melted is likely to cause surface defects in the clad material for heat exchanger.
  • the processing time is preferably 10 hours or less in consideration of productivity.
  • the superimposing step S2 is a step of superposing the core material and the side material prepared in the preparing step in a predetermined arrangement to obtain the overlapping material 40.
  • the core material ingot 25 (see FIG. 4) manufactured in the above-described step is cut to have a predetermined length by cutting the front and rear ends.
  • One side member 35 or a plurality of side members (not shown) are superposed in a predetermined arrangement on one side or both sides (not shown) to form a laminated material 40.
  • the predetermined arrangement is a clad material for a heat exchanger as a product, for example, a core material 2, a brazing material 3, a sacrificial material in the clad materials 1 a to 1 f for a heat exchanger as shown in FIGS.
  • a conventionally known method for example, a method of banding both ends of the core material 26 and the side material 35 is used. There is no problem even if a method such as welding is used in addition to the banding method.
  • each gap when overlapped is preferably within 10 mm at maximum, and preferably within 5 mm.
  • the homogenization heat treatment step S3 is a step of performing the homogenization heat treatment on the overlapping material manufactured in the overlapping step S2.
  • the overlapping material 40 manufactured in the overlapping step S2 is subjected to homogenization heat treatment in order to make the internal structure uniform and to make it soft so that hot rolling can be easily performed.
  • the hot rolling step S4 is a step of performing hot rolling after the homogenization heat treatment step S3.
  • the hot rolling step S4 as shown in FIG. 6B, the band of the overlapping material 40 is cut, and the overlapping material 40 is hot-rolled to produce the hot rolled material 1A.
  • the hot rolling method is performed by a conventionally known rolling method.
  • the rolling mill to be used the four-stage rolling mill 50 is described in FIG. 6B, but a two-stage rolling mill or a rolling mill having four or more stages (not shown) may be used.
  • FIG. 6 (b) the four-stage rolling mill 50 provided with one row of roll stands is described. However, using a rolling mill provided with a plurality of rows of roll stands (not shown), heat of a predetermined thickness is used. The hot rolling may be repeated until the cold rolled material 1A is obtained.
  • the cold rolling step S5 is a step of performing cold rolling after the hot rolling step S4.
  • the hot rolled material 1A manufactured in the hot rolling step S4 is then subjected to a cold rolling process.
  • the cold rolling treatment can be performed at a rolling reduction of 30 to 99%.
  • heat treatment annealing treatment
  • distortion correction treatment age hardening treatment
  • age hardening treatment etc.
  • a conventional method it may be cut into sizes.
  • annealing treatment rough annealing performed before cold rolling, intermediate annealing performed during cold rolling, and final annealing performed after final cold rolling in a continuous furnace or a batch furnace at 200 to 500 ° C. for 0 to 10 hours.
  • the present invention is not limited to these, and it goes without saying that the conditions can be appropriately changed as long as the effects (mechanical characteristics) obtained by these treatments are exhibited.
  • the clad material for heat exchangers according to the present invention is produced by each step of the method for producing the clad material for heat exchangers described above.
  • the following effects can be obtained.
  • the surface state and flatness are controlled, the flatness and smoothness of the side material are improved, and the oxide film thickness is further reduced.
  • air existing between the core material and each side material is efficiently discharged through the fine groove periodic form, and there is a gap between the core material and each side material. Is difficult to form and the adhesion is improved, so that the corrosion resistance of the clad material for heat exchanger can be improved.
  • the crimping property is improved, the number of crimping passes can be reduced, and the yield and productivity can be improved.
  • an aluminum alloy for core material made of JIS3003 alloy is melted and cast by continuous casting, homogenized heat treatment, face milling (surface smoothing treatment), and ingot for core material (core material (core material member)) Got.
  • an aluminum alloy for brazing material made of JIS 4045 alloy and an aluminum alloy for sacrificial material made of JIS 7072 alloy are melted and cast by continuous casting, subjected to homogenization heat treatment, sliced into predetermined thicknesses, and then subjected to face grinding. (Surface smoothing treatment) to obtain a brazing material (a brazing material member) and a sacrificial material (a sacrificial material member).
  • the brazing material and part of the sacrificial material were not subjected to homogenization heat treatment. Further, all of the core material and the side material (the brazing material and the sacrificial material) had a length of 6000 mm and a width of 1000 mm.
  • the curvature radius was measured by the method using the above-mentioned photographic image, and the period was measured by the method using the above-mentioned resin replica.
  • Ten-point average roughness (Rz) was measured at a reference length of 25 mm using a surface roughness measuring instrument (Surfcoder SE-30D) manufactured by Kosaka Laboratory based on “JIS standard B0601 surface roughness”. .
  • the flatness was measured using a flatness measuring machine (Zygo mess manufactured by Zygo).
  • a brazing material was overlapped on one side of the core material and a sacrificial material was banded on the other side, banded, subjected to homogenization heat treatment, and then pressed by hot rolling to form a three-layer plate. Subsequent cold rolling was not performed, and the material after pressure bonding by this hot rolling was used as a test material. And about the test material produced in this way, the adhesiveness of a brazing material and a sacrificial material was evaluated.
  • ⁇ Adhesion evaluation> The adhesion was evaluated by visually observing the brazing material side surface and the sacrificial material side surface, respectively, and the number of swellings (the number of swellings).
  • a bulge refers to a state in which the longest diameter (length or width) of a convexly bulged portion generated on the surface of the brazing material and the sacrificial material is 50 mm or more after the crimping rolling. If there is no blister, the adhesion is very good ( ⁇ ), the number of blisters is 1 to 3, good ( ⁇ ), and the blister number is 4 or more is judged as bad (x). did.
  • Table 1 those not satisfying the configuration of the present invention and those not satisfying the preferable configuration of the present invention are indicated by underlining the numerical values.
  • both the brazing material and the sacrificial material had very good or good adhesion.
  • the adhesiveness of the brazing material was good, but it was not very good.
  • the thickness of the brazing material is less than the preferred lower limit, and in Example 11, since the thickness of the brazing material exceeds the preferred upper limit, the adhesiveness of the brazing material is good, It was not very good. These tend to have an inappropriate cladding rate.
  • Example 14 since the flatness of the sacrificial material exceeded the preferable upper limit value, the adhesiveness of the sacrificial material was good, but it was not very good.
  • the thickness of the sacrificial material is less than the preferred lower limit, and in Example 13, the thickness of the sacrificial material exceeds the preferred upper limit, so the adhesion of the sacrificial material is good, It was not very good. These tend to have an inappropriate cladding rate.
  • Comparative Examples 1 to 12 did not satisfy the configuration of the present invention, and therefore had a large number of blisters and poor adhesion.

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PCT/JP2009/055932 2008-03-28 2009-03-25 側材およびその製造方法並びに熱交換器用クラッド材の製造方法 WO2009119653A1 (ja)

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US12/922,799 US8404360B2 (en) 2008-03-28 2009-03-25 Side material and method for producing the same and method for producing clad member for heat exchanger
CA2717372A CA2717372C (en) 2008-03-28 2009-03-25 Side material and method for producing the same and method for producing clad member for heat exchanger
CN200980106249.8A CN101952681B (zh) 2008-03-28 2009-03-25 侧材及其制造方法、以及热交换器用包层材料的制造方法
MX2010010617A MX2010010617A (es) 2008-03-28 2009-03-25 Material lateral y metodo para producir el mismo y metodo para producir un miembro revestido para intercambiador de calor.
EP09723711.9A EP2259002B1 (en) 2008-03-28 2009-03-25 Side member and method for producing the same and method for producing clad member for heat exchanger
KR1020107021518A KR101270924B1 (ko) 2008-03-28 2009-03-25 측재 및 그 제조 방법 및 열교환기용 클래드재의 제조 방법
AU2009229974A AU2009229974B2 (en) 2008-03-28 2009-03-25 Side material and method for producing the same and method for producing clad member for heat exchanger

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